Is tula ammo bad for barrel?
It's not lacquer coated anymore, it's polymer (plastic) coated which is more effective for moisture and corrosion resistance and causes fewer chamber difficulties.
It's non-corrosive and for most of us, steel case rifle ammo is non-reloadable as a general rule.
Is it of lesser quality control and made from assembling lesser components than some other ammo?
Shoot and clean appropriately.
Good plinking and training ammo, but not match ammo.